# Convertilo — Free Online Tools

> Convertilo is a free online toolkit for image processing, PDF operations, text utilities, and percentage calculators. All tools run 100% in the browser using WebAssembly — no files are uploaded to any server.

## Image Tools
- [Compress Images](https://convertilo.io/images/compress): Reduce image file size using MozJPEG, imagequant, libwebp, libavif, Gifsicle, SVGO. Supports JPG, PNG, WebP, AVIF, GIF, SVG.
- [Resize Images](https://convertilo.io/images/resize): Change image dimensions with Lanczos resampling. Supports exact pixels, percentage, and platform presets.
- [Convert Images](https://convertilo.io/images/convert): Convert between image formats (JPG, PNG, WebP, AVIF, HEIC, GIF, SVG).
- [Crop Images](https://convertilo.io/images/crop): Visual cropping tool with aspect ratio presets (1:1, 4:3, 16:9) and freeform selection.
- [Round Image Corners](https://convertilo.io/images/round): Add rounded corners to images with adjustable radius.
- [Remove Metadata](https://convertilo.io/images/remove-metadata): Strip EXIF, GPS, camera data from images for privacy.

## PDF Tools
- [Convert to PDF](https://convertilo.io/pdf/convert): Create PDF from JPG, PNG, WebP images.
- [Merge PDF](https://convertilo.io/pdf/merge): Combine multiple PDF files into one document.
- [Split PDF](https://convertilo.io/pdf/split): Separate PDF into individual pages.
- [Compress PDF](https://convertilo.io/pdf/compress): Reduce PDF file size.
- [PDF to Images](https://convertilo.io/pdf/to-images): Export PDF pages as JPG, PNG, or WebP.

## Text Tools
- [Number to Words](https://convertilo.io/text/number-to-words): Convert numbers to text in Russian and English.
- [Transliteration](https://convertilo.io/text/transliteration): Convert text between Cyrillic and Latin scripts.
- [Case Converter](https://convertilo.io/text/case-converter): Convert text between UPPER, lower, Title, and Sentence case.
- [Markdown Viewer](https://convertilo.io/text/markdown-viewer): Preview Markdown files with syntax highlighting.
- [Word Counter](https://convertilo.io/text/word-counter): Count characters, words, sentences, and paragraphs.
- [Text Diff](https://convertilo.io/text/text-diff): Compare two texts and find differences.
- [Lorem Ipsum](https://convertilo.io/text/lorem-ipsum): Generate placeholder text for design and development.

## Tools & Utilities
- [QR Code Generator](https://convertilo.io/tools/qr-code-generator): Create QR codes with custom logos and colors.
- [Password Generator](https://convertilo.io/tools/password-generator): Generate cryptographically secure passwords.
- [2FA Token Generator](https://convertilo.io/tools/2fa-token-generator): Generate TOTP codes for two-factor authentication.
- [Base64 Encoder](https://convertilo.io/tools/base64-encoder): Encode and decode Base64 strings.
- [URL Encoder](https://convertilo.io/tools/url-encoder): Encode and decode URLs.
- [JSON Formatter](https://convertilo.io/text/json-formatter): Format, validate, and minify JSON data.
- [JSON to CSV](https://convertilo.io/tools/json-csv): Convert between JSON and CSV formats.
- [Hash Generator](https://convertilo.io/tools/hash-generator): Generate SHA-256, SHA-512, MD5 hashes.
- [Color Converter](https://convertilo.io/tools/color-converter): Convert between HEX, RGB, HSL color formats.
- [Regex Tester](https://convertilo.io/tools/regex-tester): Test and debug regular expressions.
- [IP Lookup](https://convertilo.io/tools/ip-lookup): Find your IP address and geolocation.
- [Time Zone Converter](https://convertilo.io/tools/time-zone-converter): Compare and convert between time zones.
- [Pastebin](https://convertilo.io/tools/pastebin): Share code and text snippets with syntax highlighting.

## Percentage Calculators
- [Percent Calculator](https://convertilo.io/calculators/percent): Calculate X% of a number.
- [Percent of Number](https://convertilo.io/calculators/percent-of-number): Find what percentage X is of Y.
- [Discount Calculator](https://convertilo.io/calculators/discount): Calculate price after discount.
- [Compound Interest](https://convertilo.io/calculators/compound-interest): Calculate compound interest with formula A = P(1 + r/n)^(nt).
- [Loan Calculator](https://convertilo.io/calculators/loan-overpayment): Calculate monthly payments and total loan overpayment.

## Technology
All image processing uses WebAssembly codecs compiled for the browser: MozJPEG (JPEG, ~53% compression), imagequant + OxiPNG (PNG, ~75%), libwebp (WebP), libavif (AVIF, ~59%), Gifsicle (GIF, ~75% static), SVGO (SVG, ~42%). PDF tools use pdf-lib and PDF.js. No server processing — complete privacy.